US2981066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbo machine
Assignee: Individual
•
Filing: 1956-04-12
•
Granted: 1961-04-25
•
Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 Elmer G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; F02; F02C; F02C3/00; F02C3/14; F02C3/16; F04; F04D; F04D21/00; F23; F23R; F23R3/00; F23R3/28; F23R3/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2720750A
Cited
CH288547A
Cited
US2579049A
Cited
US2672011A
Cited
GB727796A
Cited
US2784551A
Cited
US2880573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |